The singers of TWO-MIX were kidnapped by two men. Conan and the Detective Boys were with one of the members and tells Inspector Megure what happened. The kidnappers want a tape that TWO-MIX sang because it had hints that led them to a crime they had done a while ago. The kidnappers want the Detective Boys to deliver it but then later, the kidnappers want Ayumi alone to deliver the tape. In the end, the Detective Boys manage to rescue TWO-MIX just in time for their concert.